Looks like the public release for 0.10 is planned for September 21st. Have you checked Interim Domain ? It's also from them.
As for Now and Then's ending I don't think Julie and Sydney being there have a bearing on who ends up being the "main wife", there's a detailed walkthrough (the link is somewhere on their Patreon, for free) that likely explains how it works, just like there's one for this game and Interim Domain.
Edit: Thought you'd have to dig a bit to find the link but you can find everything on their "about" page on Patreon, links for the games and walkthroughs.